<template>
   <div class="cmt-container">
       <h3>发表评论</h3>
       <hr>
       <textarea placeholder="请输入内容（最多120字）" maxlength="120" v-model="msg"></textarea>
       <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>

        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in comments" :key="item.add_time">
                <div class="cmt-title">
                    第{{i+1}}楼 &nbsp;&nbsp; 用户:{{ item.user_name }} &nbsp;&nbsp;发表时间:{{item.add_time | dateFormat}}
                </div>
                <div class="cmt-body">
                    {{item.content === 'undefined'? '此用户很懒' : item.content}}
                </div>
            </div>
        </div>


        <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>

   </div>
</template>

<script>
import { Toast } from "mint-ui";

export default {
  data() {
    return {
      pageIndex: 1,
      comments: [],
      msg: ""
    };
  },
  created() {
    this.getComment();
  },
  methods: {
    getComment() {
      this.$http
        .get("api/getcomments/" + this.id + "?pageindex=" + this.pageIndex)
        .then(result => {
          //成功
          if (result.body.status === 0) {
            this.comments = this.comments.concat(result.body.message);
          } else {
            Toast("加载评论失败");
          }
        });
    },
    getMore() {
      // 加载更多
      this.pageIndex++;
      this.getComment();
    },
    postComment() {
      //判断是否为空
      if (this.msg.trim().length === 0) {
        return Toast("评论内容不能为空");
      }
      this.$http
        .post("api/postcomment/" + this.$route.params.id, {
          content: this.msg.trim()
        })
        .then(result => {
          if (result.body.status === 0) {
            //手动拼接 加入到数组中去
            var cmt = {
              user_name: "匿名用户",
              add_time: Date.now(),
              content: this.msg.trim()
            };
            this.comments.unshift(cmt);
            this.msg = ""; //清空
          }
        });
    }
  },
  props: ["id"]
};
</script>

<style lang="scss" scoped>
.cmt-container {
  h3 {
    font-size: 16px;
  }
  .cmt-list {
    margin: 5px 0;
    .cmt-item {
      .cmt-title {
        line-height: 30px;
        background-color: #ccc;
        font-size: 13px;
      }
      .cmt-body {
        line-height: 35px;
      }
    }
  }
}
</style>
